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Stock-Based Compensation (Tables) | 3 Months Ended
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Apr. 04, 2020
Stock-Based Compensation |
Schedule of stock-based compensation costs recognized in the Condensed Consolidated Statements of Income | The following table presents details of stock-based compensation costs recognized in the Condensed Consolidated Statements of Income (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | April 4, | ​ | March 30,
​ |  | 2020 |  | 2019
Cost of revenues | ​ | $ | 335 | ​ | $ | 318
Research and development | ​ | ​ | 7,370 | ​ | ​ | 6,097
Selling, general and administrative | ​ | ​ | 7,608 | ​ | ​ | 6,169
​ | ​ | ​ | 15,313 | ​ | ​ | 12,584
Income tax benefit | ​ | ​ | 1,366 | ​ | ​ | 3,320
​ | ​ | $ | 13,947 | ​ | $ | 9,264

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